opensolaris man page for tcflush

tcflush(3C)						   Standard C Library Functions 					       tcflush(3C)

NAME
       tcflush - flush non-transmitted output data, non-read input data or both

SYNOPSIS
       #include <termios.h>

       int tcflush(int fildes, int queue_selector);

DESCRIPTION
       Upon  successful completion, tcflush() discards data written to the object referred to by fildes (an open file descriptor associated with a
       terminal) but not transmitted, or data received but not read, depending on the value of queue_selector:

	   o	  If queue_selector is TCIFLUSH it flushes data received but not read.

	   o	  If queue_selector is TCOFLUSH it flushes data written but not transmitted.

	   o	  If queue_selector is TCIOFLUSH it flushes both data received but not read and data written but not transmitted.

       Attempts to use tcflush() from a process which is a member of a background process group on a fildes associated with its controlling termi-
       nal,  will cause the process group to be sent a SIGTTOU signal. If the calling process is blocking or ignoring SIGTTOU signals, the process
       is allowed to perform the operation, and no signal is sent.

RETURN VALUES
       Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error.

ERRORS
       The tcflush() function will fail if:

       EBADF	 The fildes argument is not a valid file descriptor.

       EINVAL	 The queue_selector argument is not a supported value.

       ENOTTY	 The file associated with fildes is not a terminal.

       The tcflush() function may fail if:

       EIO    The process group of the writing process is orphaned, and the writing process is not ignoring or blocking SIGTTOU.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-------------------------------+
       |      ATTRIBUTE TYPE	     |	     ATTRIBUTE VALUE	     |
       +-----------------------------+-------------------------------+
       |Interface Stability	     |Standard			     |
       +-----------------------------+-------------------------------+
       |MT-Level		     |MT-Safe, and Async-Signal-Safe |
       +-----------------------------+-------------------------------+

SEE ALSO
       tcdrain(3C), attributes(5), standards(5), termio(7I)

SunOS 5.11							    14 Aug 2002 						       tcflush(3C)